{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Disease", "Chemical"], "input": "Rats that received ketanserin and alfentanil exhibited less rearing and exploratory behavior at the end of the 60 - min recording period than did animals that received ketanserin alone ."}
{"Disease": [], "Chemical": ["ketanserin", "alfentanil"]}